Front Slip-on Lens Cap</br></br>Product Description</br></br>This Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Sony/Minolta A Mount lens is an Apochromatic ultra-telephoto lens for Sony or Minolta cameras with an A-mount. It has a fast f/4.5 maximum aperture?? and it incorporates two ELD (Extraordinary Low Dispersion) glass elements to reduce chromatic aberration to a minimum. Internal focus enables responsive and fast autofocus speed.The improved DG lens design corrects